Down Time Rescheduled — A critical network upgrade must be performed to ensure continued operation of Twitter. In coordination with Twitter, our network host had planned this upgrade for tonight. However, our network partners at NTT America recognize the role Twitter is currently playing as an important communication tool in Iran.

Activists Launch Hack Attacks on Tehran Regime — While demonstrators gather in the streets to contest Iran's rigged election, online backers of the so-called “Green Revolution” are looking to strike back at the Tehran regime — by attacking the government's websites.

Apple iPhone 3GS Sold Out? Nope! — Quick, how many blogs have you read since yesterday suggesting that pre-orders for the new Apple iPhone 3GS [AAPL Loading... () ] have been so robust, that they're already sold out? Boy Genius Report had that news yesterday.

Apple begins shipping first iPhone 3G S pre-orders — Apple on Monday began shipping its new iPhone 3G S handsets to customers who were among the first to place their pre-orders last week following the handset's introduction at the company's annual developers conference.

Apple Sees High Demand For iPhone 3G S — The iPhone 3G S may be a tough handset to nab on launch day, as Apple and AT&T have already sold out of their launch day pre-order units. — Apple will likely have another hit on its hands with the upcoming release of the iPhone 3G S …

Hunch: Your “Personal Decision Maker” — Hunch is not a “search engine” insists Flickr co-founder Caterina Fake, one of the people behind the new site. But you'll probably start seeing it show up in (Google) search results, just like Wikipedia or Yahoo Answers.

Jeff Bezos at Wired Disruptive by Design conference — Jeff Bezos is very quotable. Listeing to Steve Levy interview him at the Wired Disruptive by Design event in New York, I was furiously taking notes. Here are the quotes I managed to capture: — “We've co-evolved with our tools …

Facebook Finally Catches Up To MySpace In The U.S. — It's over. Facebook is now as large as MySpace in the U.S., according to May data released today by comScore. Facebook actually passed MySpace by a smidgeon, with 70.278 million unique visitors compared to MySpace's 70.255 million.

AT&T: MMS ‘no extra cost’ for text bundle customers — Good news, everyone: it sounds like you can take a (brief) break from throwing darts at AT&T's logo and photos of its various executives. Thanks to a new FAQ from the carrier that focuses on iPhone 3G S and some of iPhone OS 3.0's new features …

US senators ask FCC to review mobile handset deals — Several U.S. senators urged regulators on Monday to review exclusive arrangements regarding mobile handset technology between wireless carriers and cell phone makers and how they affect competition and choice in the marketplace.

Is this Dell's Android smartphone ditty? — Mr. BlurryCam, meet Dell's first cellphone. At least that's what the forum jockeys are claiming on Chinese site PDAFans. We have no way to authenticate the claim but whatever we've got here is sporting a Dell logo on a Pre-esque handset running Android somewhere …

Use Their Work Free? Some Artists Say No to Google — When Google representatives recently invited dozens of prominent artists to contribute work to be featured on its new Web browser, the company enthusiastically sold the idea as an opportunity to have artwork shown to millions.

Twitter Takes A Breather — After experiencing torrid growth during the first months of the year, Twitter took a breather in May. According to new comScore data released today, Twitter had 17.6 million U.S. visitors in May, which is only 3.5 percent increase from the 17 million U.S. visitors comScore registered in April.

Sun Is Said to Cancel Big Chip Project — Sun Microsystems may have dropped a bit of weight by the time Oracle officially acquires the company. According to two people briefed on Sun's plans, the company has canceled its Rock chip project, putting an end to one of its biggest revitalization bets.

‘Documents to Go’ Appears in App Store — The iPhone version of Documents to Go, the popular document editing application suite for mobile platforms from DataViz, has finally appeared in the App Store. Documents to Go for the iPhone offers the ability to edit, create and view Microsoft Word documents …

Google: The Data Center Is the Computer — As folks increasingly store and access information online, the data centers powering cloud services need to be managed more like a single computing entity rather than a bunch of servers, according to a Google white paper (Google calls it a mini-book) released today.

Microsoft Stops Paying For Employees' iPhones — Microsoft's (MSFT) cost-cutting measures drove it to lay off thousands of employees. As expected, it also led to some perks being discontinued for its remaining employees. — For instance, Microsoft won't pay for its employees' Apple …

Microsoft to announce Azure business plan next month — Microsoft plans to announce next month more of the business details behind its Windows Azure operating system. — The software maker unveiled the cloud-based operating system at a developer conference last year.

Tech Companies Stay Close to Home for Acquisitions — Tech companies buy their neighbors much more often than they acquire companies elsewhere, according to a study of tech acquisitions since 2002. — The conclusion isn't shocking. There are a number of reasons why a buyer would be more familiar with companies based nearby.

Sprint Warns Against Palm Pre Tethering Hacking — Sprint had “politely” warned the guys behind Pre Dev Wiki to desist from all discussions regarding tethering for the Palm Pre during the Sprint exclusivity period, or Palm will be forced to take legal actions against the people running the wiki and IRC.

Coming in July: Month of Twitter Bugs — A well-known security researcher plans to use the month of July to expose serious vulnerabilities in the Twitter ecosystem. — The Month of Twitter Bugs, a project which launches on July 1, is the handiwork of Aviv Raff (left), a researcher known for his work on Web-based security issues.

Location, Location: It Still Pays to Be Near — IN a business world linked by electronic networks and cheap, nearly instantaneous communications, physical location shouldn't matter. — But it does. — Aspiring editors still move to New York, home to a huge share of the nation's trade publishers.

Does Microsoft's Bing have Google running scared? — Microsoft may have developed a contender that threatens Google's Web search dominance. — In a story headlined “Fear grips Google,” the New York Post reports that the launch of Microsoft's Bing search engine has so upset Google co-founder Sergey Brin …